Digital Adjustment Procedure; Auto Iris Control Adjustment; White Balance Adjustment - Hitachi VM-H675LA Service Manual

2.6.4 Digital Adjustment Procedure

Before Starting Adjstment
When EEPROM or the VCA circuit board is replaced,
initialize the EEPROM, referring to "2.6.3 Initial Setting By
Model" then perform all the digital adjustments.
(1) Start the MAP.
(2) Refer to display 2-6.
(3) Press B key.
(4) Refer to display 4-1.
(5) Select the number of the required adjustment.
Notes: 1. If [ESC] (escape) is pressed, the computer's
display returns toMAIN MENU display.
2. To complete adjustment, press the [ESC]
(escape) twice to restore the MS-DOS screen
and then turn off the camera/recorder and jig.

(1) Auto Iris Control Adjustment

Purpose:
To set the iris control data.
Incompleted Phenomenon:
The picture becomes too bright.
The picture becomes too dark.
Condition:
Point the camera at the light box without a chart to
full the screen (at wide-angle).
Procedure:
1) Refer to display 4-1.
2) Press 1 key.
Perform adjustment according to the computer
display hereafter.
See "4. Error Messages" if an error message appears
on the computer display.
Display & Figs
Display 2-6
MAIN MENU
***********************************************************
MANUAL ADJUSTMENT PROGRAM
***********************************************************
[A] DATA INITIALIZE
[B] ADJUSTMENT
[C] VCR ADJUSTMENT
[D] AUTO FOCUS
[E] STABILIZER
[F] SPOT NOISE
[G] LCD
[ESC] END
Please select [A] - [G] or [ESC]
3) Refer to display 4-2.
4) Press any key to return to ADJUSTMENT MENU
5) Turn the power off for 5 seconds and then on again.
(2)
Purpose:
Incompleted Phenomenon:
Test Point:
Condition:
Procedure:
1) Refer to display 4-1.
2) Press 2 key.
3) Refer to display 4-3.
4) VM-H675LA/H675LA(K):
5) Press [Enter] key, and the display changes as follows.
Display 4-1
ADJUSTMENT MENU
***********************************************************
ADJUSTMENT
***********************************************************
[1] AUTO IRIS CONTROL
[2] WHITE BALANCE
[3] CHROMA GAIN
[ESC] RETURN TO MAIN MENU
Please select [1] - [3] or [ESC]
display.

White Balance Adjustment

To set white balance under the color temperature
which becomes a reference for the auto white balance
circuit.
Color of the subject is different from that of the picture.
A white subject is not seen as white.
Video Out Jack
Attach a C12 filter.
Point at a gray scale chart (at wide-angle).
Press 0 (ZERO) C to input the data.
VM-E575LA/E575LA(K)/E573LA/E573LA(K):
Press 0 (ZERO) C to input the data.
VM-H775LE:
Press 0 (ZERO) A to input the data.
VM-E578LE(AU)/E578LE(SW)/E575LE:
Press 0 (ZERO) D to input the data.
Display 4-2
ADJUSTMENT FINISHED
Display 4-3
<< WHITE BALANCE ADJUSTMENT >>
INPUT DATA OF OFFSET FOR R-B --> 00
Display 4-4
<< WHITE BALANCE ADJUSTMENT >>
INPUT DATA OF OFFSET FOR Mg-G --> 00
PRESS ANY KEY
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